October weather forecastSullivan's Island, SC
October
Weather in October
October, like September, in Sullivan's Island, South Carolina, is another warm autumn month, with an average temperature fluctuating between 64.9°F (18.3°C) and 75.2°F (24°C).Temperature
Start of October brings a slight shift in the average high-temperature, dipping a bit from September's 82.9°F (28.3°C) to a still moderately hot 75.2°F (24°C). An average nighttime temperature of 64.9°F (18.3°C) is noted during the month of October.Humidity
In October, the average relative humidity in Sullivan's Island is 74%.Rainfall
In Sullivan's Island, during October, the rain falls for 11.7 days and regularly aggregates up to 3.23" (82mm) of precipitation. Throughout the year, there are 182 rainfall days, and 45.55" (1157mm) of precipitation is accumulated.Snowfall
In Sullivan's Island, snow does not fall in March through December.Daylight
The average length of the day in October is 11h and 22min.On the first day of the month, sunrise is at 7:13 am and sunset at 7:03 pm. On the last day of October, sunrise is at 7:36 am and sunset at 6:29 pm EDT.
Sunshine
In Sullivan's Island, the average sunshine in October is 6.7h.UV index
In October, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A daily high UV index of 5 in October leads to these guidelines:
Guard yourself - Avoiding sunburn is suggested. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Sullivan's Island, SC
- Average high temperature in October: 75.2°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (57°F).
- Average low temperature in October: 64.9°F
The month with the highest average low temperature is July (78.3°F).
The coldest month (with the lowest average low temperature) is January (45.5°F).
Average pressure in October
Sullivan's Island, SC
- Average pressure in October: 30.02"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in October
Sullivan's Island, SC
- Average wind speed in October: 9.5mph
The windiest months (with the highest average wind speed) are March and April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.4mph).
Average humidity in October
Sullivan's Island, SC
- Average humidity in October: 74%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January and March (73%).
Average rainfall in October
Sullivan's Island, SC
- Average rainfall in October: 3.23"
The wettest month (with the highest rainfall) is August (8.23").
The driest month (with the least rainfall) is January (1.42").
Average rainfall days in October
Sullivan's Island, SC
- Average rainfall days in October: 11.7 days
The month with the highest number of rainy days is August (25.9 days).
The month with the least rainy days is November (8.5 days).
Average snowfall days in October
Sullivan's Island, SC
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in October /
Average sunshine in October
Sullivan's Island, SC
- Average daylight in October: 11h and 24min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in October: 6h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in October
Sullivan's Island, SC
- Average sunshine days in October: 18.1 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is August (2.8 days).
Average UV index in October
Sullivan's Island, SC
- Average UV index in October: 5
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in October
Sullivan's Island, SC
- Average cloud cover in October: 27
The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is June (Cloud cover 25).
Average visibility in October
Sullivan's Island, SC
- Average visibility in October: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
